Dear Sir or Madame, I am currently on trial with your service and I like the quality. As I am native German speaker I mainly want to convert german audio to german text automatically. Is there anything I can do to pre-process my audio files (eg: reduce noise, remove music) etc to enhance the output and converting quality of your service? I mainly want to use the machine based version. I also would like to ask you what do I have to fulfil to get access to your API? Is that possible during trial? Thank you very much, Kind regards, Sebastian Enger